JPH0626084Y2 - Supporting means for tillage nails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a support means for a tilling claw.

An object of the present invention is to provide a support means for a tilling claw that ensures reliable support of a plurality of tilling claws and facilitates processing.

That is, conventionally, there is known one having an inclined surface in a holder hole and supporting a tilling claw by bringing a plowing claw into contact with the inclined surface and generating a wedge force by a pressing force of the inclined surface (JP-A-57-57). 560
However, this conventional device has a problem that it does not bite and its support is insufficient because the wedge force is obtained by contact with a wide surface.
The present invention aims to solve this problem.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1, FIG. 2 and FIG. 3 show one embodiment of the present invention.

First, the structure will be described. The flange disk bodies 2A and 2B, which are claw holders mounted so as to be substantially orthogonal to the tilling shaft 1 of the tilling device (not shown), are formed under the following conditions. That is, the flange disk bodies 2A and 2B constituting the mating member are formed so as to have surface rigidity, and the shaft hole 25 of the inner diameter portion that can be fitted to the outer diameter portion of the tiller shaft 1 is provided. 26 and a donut-shaped disk surface outside the shaft holes 25, 26, and a plowing claw 3 to be described later is provided on the disk surface under the optimum angle for soil plowing, and a large number of centrifugal forces are applied. And an outer diameter portion which can be stably supported by a radial arrangement having a space-like arrangement.

The width and the depth that allow the held portion 31 of the plowing pawl 3 to be described later to be held when both are concentrically joined to one surface of each of the two flange disk bodies 2A and 2B having the same diameter as described above. At least the wedge-shaped inclined surfaces 22 and 23 having a depth of 10 mm and capable of strongly supporting the blade portion 7 of the tilling claw 3 against the soil plowing reaction force. A large number of recesses 21A and 21B, which are formed on the upper end side thereof and serve as an integral holder hole 21, which are addressed to one part or half of the body (indicated by 1 or 2 in the drawing of FIG. 1), one end thereof is an outer peripheral portion. The openings are provided at appropriate intervals based on a radial angular arrangement similar to the direction of centrifugal force.
That is, the inclined surfaces 22 and 23 are wedge-shaped (sideways or laterally) with respect to the rotation surface of the flange disk body as shown in FIG. 3 when viewed from the opening direction of the holder hole, that is, the fitting direction of the held portion 31. It is inclined so that the upper part of the figure becomes narrower. Bolt holes 24 for bolting the tilling claws 3 are formed at approximately the center of the side walls of the recesses 21A and 21B.
A and 24B are concentrically penetrated.

Further, the tilling claw 3 detachably fitted in the holder hole 21 is constituted by the blade portion 7 and the holder portion 31, and is constructed as follows.

The holder portion 31 has the holder hole 21 as described above.
Is formed to correspond to. That is, as shown in FIG. 3, the held portion 31 is formed with wedge-shaped inclined surfaces 32 and 33 which can be brought into close contact with the inclined surfaces 22 and 23 of the holder hole 21 at least on the upper end side thereof, and both of them are corner portions. It is configured to contact at one point C (dotted or minute area).

That is, when the tiller is rotating, the inclined surfaces 22, 2 on the holder hole side
3 is configured such that the crossing position when the inclined surfaces 32 and 33 on the holder portion side move in parallel in the vertical direction is the corner portion C.

In addition, a bolt hole 35 is pierced at approximately the center of the side surface portion. The blade portion 7 of the tilling claw 3 is integrally connected to the tip end portion of the holder portion 31 in such a manner that the blade portion 7 is aligned with the holder portion 31 in the longitudinal direction (see FIG. 2). ).

Further, the bolt 4 connects the flange disc bodies 2A and 2B with
Bolt holes 24A, 24B of the recesses 21A, 21B when the shafts 1 and 2 are axially fitted by the shaft holes 25, 26, respectively.
And the bolt holes 35 of the tilling claws 3 are inserted from one side, and the above-mentioned tilling claws 3 are detachably fixed to the holder holes 21 by tightening the nuts 5 on the outside of the other side.

Note that FIG. 3 shows a modified example of the recess 21 and the fixing portion of the claw and the holder, and one (the left inner side in the figure) of the mating surface portion of the flange disk bodies 2 and 2 is made into a concave shape. Also, instead of the bolt 4, the stop pin 6 is provided with pin holes 24, 2 of the disk bodies 2, 2.
4 and the pin hole 34 of the cultivating claw 3 so that the cultivating claw 3 is detachably fixed to the disc bodies 2 and 2. The stop pin 6 is retained by a split pin or the like (not shown).

When the tilling claw 3 is detachably attached to the outer peripheral portion of the tiller shaft 1 with the above configuration, the flange disk bodies 2A and 2B are fitted on the shaft of the tiller shaft 1 by the shaft holes 25 and 26 of both. After that, when the recesses 21A and 21B provided on the one surface are aligned with each other, the holder hole 21 addressed to each integral can be formed at each position. In this case, only one flange disc body 2A is fixed to the cultivating shaft 1 and the other disc body 2B is not fixed to the cultivating shaft 1, but is integrated with the disc body 2A as described later. You can also do it. In this case, at the time of assembly, the disc body 2
A large number of tillers 3 can be sub-assembled on the B side, which facilitates the assembly. And each of the above holder holes 2
1, the holder part 31 of the tillage claw 3 is inserted, and as shown in FIG. 2, the bolt holes 24A, 24B, and 35 in the concentric state are inserted with the bolts 4 from the outside and the nuts are provided on the outside of the other side. When 5 is tightened, the flange disk bodies 2A and 2B can be integrated, and at the same time, a large number of plowing pawls 3 can be easily and quickly and accurately attached to the outer peripheral portion of the plowing shaft 1 radially. In addition, as shown in FIG.
It can also be installed with.

Further, when the tiller shaft 1 is rotated by the operation of a prime mover (not shown), and when the tiller claw 3 starts to till the soil, the tiller nail 3 receives the reaction force of the tiller of the soil via the blade portion 7. However, the holder portion 31 of the tillage claw 3 rotates about the bolt 4 (or the stop pin 6) as a fulcrum, and the corner portion C of the inclined surfaces 32 and 33 formed on the upper side portion thereof is the inclined surface of the holder hole 21. Since the so-called wedges are pressed against 22 and 23 so as to come into contact with each other at a point or in a minute area, the holder portion 31 is firmly supported in the holder hole 21 at each position and stably. In addition, the plowing work of the soil can be carried out smoothly and easily.

At that time, the plowing reaction force of the individual tilling claws 3 is borne by the individual holder holes 21, but the borne force is received by the entire flange discs 2A, 2B and transmitted to the cultivating shaft 1. Becomes Therefore, since the load of the tilling claw 3 due to the rotation of the tiller shaft 1 at each time is carried through the whole circumference fixing portion of the disc body, the holders are fixed one by one. Compared with the ones that do, the mounting process with a sheet metal or the like becomes easier and the cost can be reduced.

Further, the plowing reaction force load of the tilling claw 1 is not applied to the bolt 4 (or the retaining pin 6), so that the bolt 4 is simply the tilling claw 3.
It only serves to attach the plow, and thereby the plow claw 3 can be easily attached and detached.

The flange discs 2A and 2B of the above-described embodiments are each configured as a disc having a surface rigidity and being fixed substantially orthogonally to the tilling axis. However, it is sufficient to form the holder hole between the mating portions with the other member.

As described above, according to the present invention, the tilling reaction force of each tilling claw can be reliably supported by the clamping support means by the contact of a point or a small area, and at the same time, each tilling Since the supporting force based on the reaction force can be received by the entire flange disk body, it is possible to form the claw holder with a sheet metal or the like, and it is easy to process and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of an essential part showing a supporting means of a tilling claw in one embodiment of the present invention, FIG. 2 is a vertical sectional view taken along line II-II of FIG. 1, and FIG. 3 is III- of FIG. FIG. 11 is a cross-sectional view taken along the line III, showing a modified example in the recess of the disc body and the fixing portion of the claw and the holder. (Explanation of symbols representing main parts of the drawing) 1 ... tilling shaft 1 2, 2A, 2B ... flange disc body (claw holder) 3 ... tilling claw, 4 ... bolt 21 ... holder hole, 31 ... holder part

Claims (1)

[Scope of utility model registration request] 1. A claw holder fixed to a cultivating shaft is constituted by a mating member, and at least one of the mating members is constituted by a flange disk body having surface rigidity, which is mounted substantially orthogonal to the cultivating shaft, A holder hole for supporting the holder part of the tilling claw is provided between the mating portions of the recesses formed in each of the joining members, and the tilling claw is inserted into the holder hole so that the center of the side surface is fastened by the fastener. The holder hole has inclined surfaces 22 and 23 that are inclined when viewed from the inserting direction of the tilling claw, and the holder portion is a point or a minute portion due to the contact of the mating member with respect to the inclined surfaces 22 and 23. Have inclined surfaces 32 and 33 that come into contact with each other, and the tilling claw receives the reaction force of plowing to rotate about the fastener as a fulcrum, and the slanting surfaces of the inclined surfaces 22 and 23 and the inclined surfaces 32 and 33 are crushed. So that both sides bite into a wedge Touch the claw holder so as to support the tilling claws to, the flange disk body support means tilling claws that are more disposed substantially radially in the rotational plane with respect to the center of the surface of revolution.